IS 5312-1: Swing Check Type Reflux (Non-Return] Valves for Water Works Purposes, Part 1: Single-Door Pattern

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IS 5312-1 (2004) : Swing Check Type Reflux (Non-Return]
Valves for Water Works Purposes, Part 1: Single-Door
Pattern [CED 3: Sanitary Appliances and Water Fittings]

Jawaharlal Nehru
'Step Out From the Old to the New'

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IS 5312 (Parti) .2004

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Indian Standard

SWING CHECK TYPE REFLUX (NON-RETURN)
VALVES FOR WATER WORKS PURPOSES —

SPECIFICATION

PART 1 SINGLE DOOR PATTERN

( Second Revision )

ICS 91.140.70

©BIS 2004

BUREAU OF INDIAN STANDARDS

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

November 2004 Price Group 3

Sanitary Appliances and Water Fittings Sectional Committee, CED 3

FOREWORD

This Indian Standard (Part 1 ) (Second Revision) was adopted by the Bureau of Indian Standards, after the draft
finalized by the Sanitary Appliances and Water Fittings Sectional Committee had been approved by the Civil
Engineering Division Council.

This standard was first published in 1984. In this revision, nominal pressures of the valves have been aligned
with those specified in IS 14846 : 2000 'Sluice valves for water works purposes (50 to 1 200 mm size) —
Specification'. Other changes keeping in view the current manufacturing practices in the country have been
made.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with
IS 2 : 1960 'Rules for rounding off numerical values (revised)*. Tlje number of significant places retained in
the rounded off value should be the same as that of the specified value in this standard.

IS 5312 (Parti): 2004

Indian Standard

SWING CHECK TYPE REFLUX (NON-RETURN)
VALVES FOR WATER WORKS PURPOSES —

SPECIFICATION

PART1 SINGLE DOOR PATTERN

( Second Revision )

1 SCOPE

1.1 This standard (Part 1) covers requirement for
flanged reflux valves of single door, swing check type
used for water works purposes of sizes 50 to 600 mm.

1.2 Double disc check and lift check valves are not
covered under the scope of this standard.

2 REFERENCES

The standards given in Annex A contain provisions
which, through reference in this text, constitute
provisions of this standard. At the time of publication,
the editions indicated were valid. All standards are
subject to revision and parties to agreements based on
this standard are encouraged to investigate the
possibility of applying the most recent editions of the
standards given in Annex A.

3 NOMINAL PRESSURES

Reflux valves shall be designated by nominal pressure
(PN) defined as maximum permissible gauge working
pressure (MPa). The nominal pressure for the various
sizes shall be as follows:

Nominal Pressure
MPa

1.0 and 1.6

Size of Valve
mm

50 to 600

4 NOMINAL SIZES

4,1 Reflux valves shall be of the following nominal
sizes:

50,65,80, 100, 125, 150,200,250,300,350,400,450,
500 and 600 mm.

4.1.1 The nominal size shall refer to the nominal bore
of the water way. The actual bore at any point shall
not be less than the nominal size given in 4.1.

5 MATERIALS

The materials used for the manufacture of different
component parts shall conform to the requirements
given in Table 1. Where alternative materials are

specified in Table 1 these may be used subject to their
stipulation in the contract or order.

6 MANUFACTURE

6.1 Typical illustration of reflux valves are given in
Fig. 1,2 and 3.

62 The dimensions of the valves shall be as per
Table 2, read with Fig. 1, 2 and 3.

63 All the parts of the valves shall be designed so as
to withstand the specified test pressures.

6.4 The area for flow passage at any cross-section in
the valve shall not be less than the area of the nominal
bore of the valve.

6.5 The design of hinge, hinge pin, door and door
suspension shall be such to ensure free swinging of
the door. In closure, the door face shall have close face
contact with the body ring by gravity only.

6.6 The design of valves used in vertical pipe lines
shall be such that in the working position the valves
positively close when the flow in the pipe comes to a
stop.

6.7 The thickness of metal in all castings shall be
maintained as uniform as possible throughout any
section to avoid strains set up by sudden changes of
cross-section.

6.8 Each reflux valve shall carry an arrow, very
prominently to indicate the direction of flow. The
arrow shall be cast integrally on the body.

6.8.1 The arrow shall be located on the left-hand side
of the observer while he faces the direction of flow,
unless otherwise specified by the purchaser.

6.9 Flanges

Unless otherwise specified in the contract or order, the
flanges and their dimensions of drilling shall be in
accordance with IS 1538. For valves of 50 and 65 mm
nominal sizes the dimensions and drilling of flanges
shall be in accordance with Table 3.

1

IS 5312 (Part 1) : 2004

6.10 The inside diameter of the body ring shall not be
less than the nominal bore of the valve.

6.10.1 The face of the body ring shall protrude clear
of the surrounding cast iron by not less than 1.5 mm.

6.11 Doors and Hinges

The design of the doors and hinges shall be suitable so

as to withstand satisfactorily the repeated impacts
likely to occur during service.

6.12 Door Faces

The minimum thickness of door face shall be 5 mm.

6.13 By-Pass Arrangements

The minimum size of by-pass arrangements, shall be
as given in Table 4.

<v^^

AIR RELEASE PLUG

CASKET

COVER

BE ARING BLOCK

jfiTfirn

HINGE RN

DOOR FACE

BQQR

BODY SEAT

ftoonr

NOTE — The shapes of parts are only illustrative and the minimum requirements, where specified, are binding

Fig. 1 Typical Illustration of Reflux Valve with Inclined Seating and Side By-Pass

Arrangement

BY-PASS VALVE IN
CLOSED POSITION

BY-PASS VSALVE IN

open POsrnoN

DOOR FACE

SECTION 'X-X'

NOTE — The shapes of parts are only illustrative and the minimum requirements, where specified, are binding

Fig. 2 Typical Illustration of Reflux Valve with Vertical Seating and Integral By-Pass

Arrangement

IS 5312 (Parti): 2004

VALVE

SECTION 'X-X'

NOTE — The shapes of parts are only illustrative and the minimum requirements, where specified, are binding

Fig. 3 Typical Illustration of Reflux Valve with Vertical Seating and Side By-Pass

Arrangement

Table 1 Material for Different Component Parts of Reflux Valves

(Clause 5)

S) Component
No.

Preferred
Material

Refto
IS No.

(U (2)

(3)

(4)

i) Body, cover, door,
bearing holder

Grey cast iron

210

ii) Hinge pin, door pin Stainless steel
and door suspension pin

6603

iii) Body seat rings
iv) Door face ring

v) Bearing bushes/
Bearing block

vi) Plugs for hinge pin/
Air release plug

vii) Bolts

viii) Nuts

ix) Gaskets

x) Hinges

Leaded tin bronze 3 1 8

Leaded tin bronze 318

Leaded ti n bronze 3 1 8

Leaded tin bronze 318

Grade or Alternate

Designation Material

(5) (6)

FG 200 Grey cast iron spheroidal or
nodular cast iron cast steel

l2Crl2 High tensile brass,
stainless steel

LTB 2 Stainless steel

LTB 2 Natural/synthetic rubber
stainless steel

LTB 2 P.T.F.E.
LTB 2 Stainless steel

Carbon steel
Carbon steel
Rubber
Grey cast iron

1363 (Parti) Class 4.6 —
1363 (Part 3) Class 4.0 —
638 Type B CAF

Ref to

Grade or

IS No.

Designation

(7)

(8)

210

FG260

1865

500/7

1030

230-450 W

320

HT2

6603

04Crl9Ni97

04Crl7Nil2Mo2

3444

Grl/Gr4/Grl0

210

FG200

Malleable cast iron
cast steel

3444 Grl/Gr4/Grl0

6603 12Crl2/

04Crl9Ni 09/

04Crl7

Nil2Mo2

2712

14329
1030 230-450 W

IS 5312 (Part 1) : 2004

Table 2 Dimensions of Reflux Valves

(Clause 6.2 and Fig, 1,2 and 3)

All dimensions in millimetres.

Size 50

65

80

100

125

150

200

250 300

350

400 450 500

600

Length {L) 203

216

241

292

330

356

495

622 698

787

914 978 978

1295

Alternate

Length (L) 200

240

260

300

350

400

500

600 700

800

900 1000 1 100

1300

Hinge Pin Diameter, Min 1

10

10

12

12

16

20

22 25

25

32 32 38

38

Tolerance on length, mm :

Range Tolerance

0to250 ±2
251 to 500 ±3
501 to 800 ±4
801 to 1000 ±5
I 001 to 1300 ±6

NOTE — Alternate lengths as given above will be withdrawn after 3

years from the date of publication of this standard.

Table 3 Dimensions and Drilling of Flanges

(Clause 6.9)
AH dimensions in millimetres.

SI

No.

(1)
i)

»)
iii)

iv)
v)
vi)

Particulars

(2)
Outside diameter, D
Thickness of flange
Diameter of bolt circle, C
Number of holes (Equally spaced off centre)
Diameter of bolt holes, d
Diameter of bolts

Dimensions for Nominal Size

A , _

50

(3)

165! \i

16!£°

125+1.0

4

19

16

65

(4)

mt\i

16!o-°

145+1.0

4

19

16

IS 5312 (Parti): 2004

Table 4 Sizes of By-Pass Arrangements

(Clause 6.13)
All dimensions in millimetres.

Size of Valves

50

65

80

100

125

150

200

250

300

350

400

450

500

600

Size of By-Pass

Arrangements, Min

10

10

10

10

15

15

25

25

40

40

40

50

50

65

6.13.1 The by-pass arrangement shall be located
either at the top only in case of integral type
arrangement (see Fig. 2) or on the right-hand side of
the observer when facing in the direction of flow (see
Fig. 1 and Fig. 3) unless otherwise specified in the
contract or order.

6.13.2 By-Pass Valves

By-pass valves (external) up to and including 40 mm
size shall be of gunmetal (see IS 778) Class 1 for PN

1 .0 and Class 2 for PN 1.6 rating valves. The by-pass
valve of 50 mm size shall be of same rating as the main
valve.

7 COATING

7.1 All coatings shall be carried out after satisfactory
testing of the valves prior to despatch. All the
unmachined ferrous surfaces of the valve (both inside
and outside) shall be thoroughly clean, dry and shall
be free from rust and grease before painting. All
exposed machined ferrous surfaces shall be painted
with one coat of aluminium red oxide primer.

7.2 Two coats of black Japan conforming to Type B
of IS 341 or paint conforming to IS 9862 or IS 2932
shall be applied by brush or spray for exterior
application in colour as approved by the purchaser.

NOTE — A valve may be assembled without coating if a
purchaser specifically desires to inspect the assembled valve
without coating.

8 TESTING

8.1 Each valve shall be subjected to the hydrostatic
tests specified in 8.2 and 8.3. The test duration shall be
as specified in Table 5.

8.2 Hydrostatic Body Test

All valves shall be subjected to hydrostatic body test
at appropriate test pressure given in Table 5 and shall
show no leakage or permanent distortion under this
pressure when both ends are blanked and the pressure
is applied at the inlet end.

8.3 Hydrostatic Seat Test

Pressure as per Table 5 to be applied at the outlet side
of the valve with the other side open to atmosphere.
There shall not be any visible leakage during the test.

Table 5 Test Duration and Pressure

{Clauses &A,&.2 and S3)

S! PN Rating

Test for

Test Pressure

Test

No.

(Gauge)

Duration

MPa

min

(i) (2)

(3)

(4)

(5)

i) PN1.0

Body

1.5

5

Seat

1.0

2

ii) PN1.6

Body

2.4

5

Seat

1.6

2

9 INSPECTION

The purchaser or his authorized representative shall
have free access to the works of the manufacturer at
all reasonable times to inspect the valve at any stage
of manufacture and to reject any material which does
not conform to the specified requirements.

10 INFORMATION TO BE SUPPLIED WITH
ENQUIRY OR ORDER

The following information is supplied by the
purchaser with enquiry or order:

a) Size of valve;

b) Maximum cold non-shock working pressure;

c) Material of body, door and cover;

d) Operating position of valve horizontal, vertical
or inclined;

e) Whether by-pass arrangement required or not;

f) Flow velocity or volumetric flow rate;

g) Whether the water is corrosive and if so, details
to be given; and

h) Flange details if other than mentioned in this
standard.

11 MARKING

11.1 Following information shall be cast on each
valve body in raised letter:

a) Manufacturer's name or trade-mark;

b) Nominal pressure of valve (PN 1 .0 or PN 1 .6);

c) Size of valve, mm;

d) Direction of flow; and

e) Heat No. of cast.

11.2 BIS Certification Marking

Each valve may also be marked with the Standard
Mark,

11.2.1 The use of Standard Mark is governed by the
provisions of the Bureau of Indian Standards Act,

IS 5312 (Part 1) : 2004

1986 and the Rules and Regulations made thereunder.
Details of conditions under which a license for the use
of the Standard Mark may be granted to manufacturers
or producers may be obtained from the Bureau of
Indian Standards.

12 PACKING AND STORAGE

12.1 Valve shall be complete in all respects when
shipped.

12.2 Valve shall be drained and the door adequately
blocked in the closed position. The manufacturer shall
use care in preparing valves for shipment, so that no
damage will occur during handling or in transit.

12.3 Valve shall be stored in roofed store, away from
dirt.

IS No.

210:1993

ANNEX A

(Clause 2)
LIST OF REFERRED INDIAN STANDARDS

Title

Grey iron castings — Specification
(fourth revision)

318 : 1981 Specification for leaded tin bronze

ingots and castings (second revision)

320 : 1980 Specification for high tensile brass

rods and sections (other than forging
stock) (second revision)

341 : 1973 Black Japan types A, B and C (first

revision)

638 : 1979 Specification for sheet rubber joint-

ing and rubber insertion jointing
(second revision)

778 : 1984 Specification for copper alloy gate,

globe and check valves for water
works purposes (fourth revision)

1030 : 1998 Carbon steel castings for general
engineering purposes (fifth revision)

1 363 Hexagon head bolts, screws and nuts

of product grade C

(Part 1) : 2002 Hexagon head bolts (size range M 5
to M 64) (fourth revision)

(Part 3) : 1992 Hexagon nuts (size range M 5 to M
64) (third revision)

IS No.
1538 : 1993

1865 : 1991

2712:1998

2932 : 1993
3444 : 1999

6603 : 2001
9862 : 1981

Title

Cast iron pipe fittings for pressure
pipes for water, gas and sewage
(third revision)

Iron castings with spheroidal or
nodular graphite (third revision)

Gaskets and packings — Com-
pressed asbestos fibre jointing (third
revision)

Enamel, synthetic, exterior (a) un-
derrating (b) finishing —
Specification (second revision)

Corrosion resistant alloy steel and
nickel base castings for general ap-
plications — Specification (third
revision)

Stainless steel bars and flats —
Specification (first revision)

Ready mixed paint, brushing,
bituminous, black lead free, acid
alkali, water and chlorine resisting

14329 : 1995 Malleable iron castings

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This Indian Standard has been developed from Doc : No. CED 3 (7118).

Amendments Issued Since Publication

Amend No.

Date of Issue

Text Affected

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Printed at Prabhat Offset Press, New Delhi-2

AMENDMENTNT NO. 1 NOVEMBER 2005

TO

IS 5312 (PART 1) : 2004 SWING CHECK TYPE

REFLUX (NON-RETURN) VALVES FOR WATER

WORKS PURPOSES — SPECIFICATION

PART 1 SINGLE DOOR PATTERN

(Second Revision)

( Page 5, clause 6.13.2, line 4 ) — Insert 'and 65 mm' after '50 mm'.

(CED3)

Reprography Unit, BIS, New Delhi, India